Trevor Morrison is currently the Dean and Eric M. and Laurie B. Roth Professor of Law at New York University School of Law. He was previously the Liviu Librescu Professor of Law at Columbia Law School, where he was also faculty co-director of the Center for Constitutional Governance and faculty co-chair of the Hertog Program on Law and National Security. He spent 2009 in the White House, where he served as associate counsel to President Barack Obama. Drawing on both his scholarship and work experience, he has developed particular renown for his expertise in constitutional law as practiced in the executive branch. From 2003 to 2008, Dean Morrison taught at Cornell Law School, and was a visiting associate professor at NYU Law in 2007. Before entering academia, he was a law clerk to Judge Betty B. Fletcher of the U.S. Court of Appeals for the Ninth Circuit (1998-99) and to Justice Ruth Bader Ginsburg of the U.S. Supreme Court (2002-03). Between those clerkships, he was a Bristow Fellow in the U.S. Justice Department's Office of the Solicitor General (1999-2000), an attorney-advisor in the Justice Department's Office of Legal Counsel (2000-01), and an associate at Wilmer, Cutler & Pickering (now WilmerHale) (2001-02). Dean Morrison received a B.A. (hons.) in history from the University of British Columbia in 1994, and a J.D. from Columbia Law School in 1998. He was also a Richard Hofstadter Fellow in History at Columbia University.